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Central Heating & Storage Heaters Forum
(re) wiring a CH system with a heat store tank.
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<blockquote data-quote="ProDave" data-source="post: 265419" data-attributes="member: 6969"><p>It's all UFH and the UFH has it's own control box a bit like the one you pictured.</p><p></p><p>The way all (at least all that I have seen) UFH systems work is the UFH controller reads the room stats and controls the manifold valves and the manifold pump. BUT it sends a "call for heat" which normally fires up the boiler, if it's fed directly from a boiler.</p><p></p><p>In this case, it "calls for heat" from the heat store, so instead of firing up the boiler, will fire up the pump that pumps hot water from the heat store to the UFH manifold.</p><p></p><p>A lot of people don't have UFH on a timer but have it on 24/7, usually because of the long heat up times of UFH, but in my own house we have it on a conventional programmer and it works well.</p><p></p><p>I've spoken to the plumber and am confident he knows what he's doing and has plumbed it correctly. It was the first electrician that didn't understand it, and instead wired the UFH "call for heat" directly to the boiler, as it says to do in the UFH sytem instructions. He lacked the knowledge to realise a heat store system operates differently.</p><p></p><p>It's funny how I seem to be doing a lot of heating systems this week in all this hot weather. On Wednesday I was finalising the finer points of another, different heat store system powered by a wood burning stove. We had the stove lit and all the doors and windows open to let the heat out.</p></blockquote><p></p>
[QUOTE="ProDave, post: 265419, member: 6969"] It's all UFH and the UFH has it's own control box a bit like the one you pictured. The way all (at least all that I have seen) UFH systems work is the UFH controller reads the room stats and controls the manifold valves and the manifold pump. BUT it sends a "call for heat" which normally fires up the boiler, if it's fed directly from a boiler. In this case, it "calls for heat" from the heat store, so instead of firing up the boiler, will fire up the pump that pumps hot water from the heat store to the UFH manifold. A lot of people don't have UFH on a timer but have it on 24/7, usually because of the long heat up times of UFH, but in my own house we have it on a conventional programmer and it works well. I've spoken to the plumber and am confident he knows what he's doing and has plumbed it correctly. It was the first electrician that didn't understand it, and instead wired the UFH "call for heat" directly to the boiler, as it says to do in the UFH sytem instructions. He lacked the knowledge to realise a heat store system operates differently. It's funny how I seem to be doing a lot of heating systems this week in all this hot weather. On Wednesday I was finalising the finer points of another, different heat store system powered by a wood burning stove. We had the stove lit and all the doors and windows open to let the heat out. [/QUOTE]
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(re) wiring a CH system with a heat store tank.
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